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G. W. FERGUSON. Extension Cornice. No. 232,479. Patented Sept. '21, 1880.

N. PETERS. PHOTO L THUGRAPHER llbww UNITED STATES PATENT I DFFIGE.

GEORGE W. FERGUSON, OF NEW YORK, N. Y.

EXTENSlON-CORNICE.

SPECIFICATION formingpart of Letters Patent No. 232,479, dated September 21, 1880.

Application filed June 10, 1880. (No model.)

To all whom it may concern:

Be it known that I, GEORGE W. FERGUSON, of the city of New York, in the county and State of New York, have invented certain new and useful Improvements in Extension- Gornices, of which the following is a specification.

The object of my invention is to provide an extension-cornice of fine appearance, and at a very small cost as compared with those heretofore made.

My invention consists in the combination, in a cornice, of a center-piece and longitudinally-adjustable wings, and a piece of sheet metal attached to the center-piece at its opposite edges, and forming the back and upper and lower sides of a tube or socket which conforms in transverse section to the wings, and the metal of which is corrugated longitudinally to give it additional strength.

It also consists in details of construction to be hereinafter explained.

In the accompanying drawings, Figure 1 represents a plan of my improved cornice, a portion of the tube being broken away to better illustrate the construction and Fig. 2 represents a transverse section of the cornice upon the dotted line a; as, Fig. 1.

Similar letters of reference designate corresponding parts in all the figures.

A designates the centerpiece of the cornice, which may be of any suitable design or pattern.

B designates the side wings, which are adapted to be adjusted inward upon each side of the center-piece to contract the cornice or to be adjusted outward to extend the same.

To provide for attaching the wings to the center-piece so as to permit of this adjustment I construct the center-piece with a tube, 0. This tube is of a shape to conform to the transverse section of the wings B, and the said wings are adapted to be inserted into the said tube, thus forming a telescopic joint, which affords proper provision for the extension or contraction of the cornice.

Where a short center-piece, A, is employed, as in the present example of my invention, a single tube is employed extending nearly the whole length of the center-piece but where a long center-piece is employed a separate tube may be attached thereto near each end thereof.

In order to afford a slight frictional resistance to the sliding movement of the wings B Within the tube 0, I apply to the back of the center-piece, which forms one side of the said tube, a layer of felt, a, or other soft yielding material, which also serves to prevent the faces of the wings from being scratched by contact with the inside of the tube.

The wings may fit the tube so tightly that when once adjusted they will be retained in position by friction, or I may employ other means for securing themas, for instance, pins 12, inserted through'holes c in the side of the tube and entering any one of a series of holes in the wings.

I form the back and upper and lower sides or top and bottom of the tube 0 of a piece of sheet metal, one edge of which is inserted under and secured by a piece, 6, forming a portion of the front of the center-piece, and the other edge of which is inserted under and secured by a strip, f, attached to the back of the.

center-piece.

I also corrugate the metal of the tube, as shown at g h, in order to strengthen the tube and enable it to be made of thin metal, and when so made the wings are constructed with ribs or projections and grooves or depressions fitting said corrugations.

In lieu of the strips 6 and f, the edges of the sheet metal might be secured in any other desirable manner, the metal constituting in any case three sides of the tube.

By my invention I provide an extensioncornice which may be cheaply constructed, and the wings of which are afforded a long bearing in the center-piece, and thereby adequately supported.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, in a cornice, of a centerpiece and longitudinally-adjustable wings, and a piece of sheet metal attached to the back of the center-piece at opposite edges, forming the back and upper and lower sides of a tube or socket which conforms in transverse section to the wings, and the metal of which is corrugated longitudinally, substantially as and for the purpose specified.

2. The combination of the center-piece A, the wings B, and the sheet metal attached to the centerpiece by strips or pieces 6 f, and forming with said center-piece the tube or socket G, substantially as specified.

Witnesses: G. W. FERGUSON.

' FREDK. HAYNES,

THoMAs E. BIRCH. 

